Telescoping radio loop or antenna



Sept. 13, 1927.v 1,642,350

L. ADAMS TELESGOPING RADI-:O LOOP OR ANTENNA v Filed Feb.'6. 1926 Patented Sept. 13, 1927.

UNITED STATES PATENT oFF-icE--.g

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TELEBIOOPING RADIO LOOP OB ANTENNA.

Application nled February My invention relates to radio antennae or tuning devices for either the reception or transmission of radio signals, and my object is to provide a simple apparatus that can be adjustable and tunable to various wave lengths or radio frequencies by having the exact length or area of either inductive or transmissive surface.

I attain this object by the device shown in the accompanying drawings in which- Fig. 1, represents a perspective view of my Vtelesco ing radio loop or antennae.

Fig. 2, s ows the electric'circuit. y

Fig. 3, shows the telescoping element and electric contact brushes.

Similar numerals refer to similar parts throughout the drawings.

This telescoping radio loop or antennae consists of a suitable frame (1), in which are suitably positioned insulated U or similar shaped members (2)' which form one half, or a section, of a complete loop. The upright or extending segments of these U or similar shaped members (2) are hollow andl have at their ends suitable brushes (3). This section may also consist of a single straight member.

A secondary frame (4) in which are suitably positioned and insulated corresponding U or similar shaped members (5) to suit-l ably telescope the segments'of the U or similar shaped members (2). This section may also consist of a single straight member to correspond to section above in such a manner so as to involve the telescoping principle.

The brushes (3) make an electric contact on each sliding or telescoping member (5).

The U or similar shaped members 2 and 5 are to telescope into each other so as to make a continuous multiple coil or loop and not a series of closed loops. However a single as well as a connected series of closed loops also the single as well as a numberrof straight members mentioned above if using the telescoping principle, are to be considered included in this application.

This apparatus may be made in various styles and shapes. Scales and gauges may be applied and a mechanism may be employed to o erate the telescoping movement as may be esired.

What I claim and desire to secure by Letters Patent are:

1. A radio tuning device, comprising a plurality of-co-acting` members, each provided with an insulated portion 'formlng a s, 192s. serial no. 86,044.

tions of such members being so formed that when the members are brought into contact with each other they willv telescope each other, whereby the length of the loop thus foimei ma betvari'ed :is desired.

ra io umn evice com risin a plurality of co-actig membe 4p g vided with an insulated portion forming a section of a loop, the. extending se ental portions of one of such members being holow and the corresponding extendingsegmental ortions of the co-acting member being so id, so that when the co-actin members are brought into contact wit each other, they will telescope each other, whereby the length of the loop thus formed may be varied as desired. v ,A

3. radio tuning device, comprising a plurality of co-a'c/ting members, each provided with an insulated portion forming a section of a loop, the extendingse ental portions of one of such members being hollow and the corresponding extending segmental portions of t e co-acting member bein g solid, and electric contact means mounted. within the hollow extending segmental portion of one of the members, whereby the length of the loop thus formedmay be varied as desired andan electric contact between the members may be assured. i 4. A radio tuning device, comprising an insulated, transmissive unit, so shaped as to form a section of a loop, and a separate coactlng insulated, transmissive unit, so shaped that when the two units are in contact with each other, they will form a complete loop, the extending segmental portion of one of such units being hollow and adapted to receive the solid extending segmental portion of the other co-acting member, whereb the units may telescope each other an length of the loop thus formed may be varied as desired. p

5. A radio tuning device, comprising an insulated, transmissive unit so shaped as to form a section of a loop, and al separate insulated, transmissive unit so formed that when the two units are in contact with each other they will form a complete loop, the two units being provided with co-acting -means for telescoping each other,whereby the length of the loop thus formed may be varied as desired. x

6. A radio tuning device, comprising a plurality of insulated, tranSmSSive units rs, each prothe forming a' section of a loop, and'a plurality of co-acting, insulated, transmissive u nits so formed that when the two units are in contact with each other, the will forni a continuous multiple loog, t e extending segmental portions of t e two umts being so formed that they will telescope each other when brought into contact, whereby the length of the loop thus formed by the contactin co-acting units may be varied as desired.

7. A radio tuning device comprising a lurality of insulated, transmissive umts orming a section of a loop, anda plurality of co-acting, insulated, transmissive umts so formed that when the two units are in contact with each other they will form a con-.. tinuous multiple loop, the segmental extending portions of one of the units being hollow, and the co-acting, extending segmental portions of the other unit being solid, whereby when the two units are brought into contact, the will telescope each other and a length of t e loop thus formed may be varied as desired.

8. A radio tuning device comprising a luralityof insulated transmisslve units orming a section of a of co-acting, insulated, transmissive units so formed that when the two units are in contact with each other they will form a continuous multiple loop the segmental extending portions o one oi the units being hollow, and the co-acting, extending se mental portions of the other unit being so id, and electric contact means so mounted in each of the extending segmental portions of one of the units that the co-acting solid extending segmental portion of the other unit will make an electric contact with each other, whereby the units will telescope each other and the length of the loop thus formed may be varied as desired.

LEONARD ADAMS.

loop, and a plurality' 

